DP780/HC660不等厚异质高强钢电阻点焊接头组织与性能的研究
发布时间:2021-04-07 16:44
采用多材料不等厚高强度钢结构设计制造车身承力结构件是实现汽车轻量化,保证汽车碰撞安全性的重要手段之一。异质高强钢材料物理属性、化学成分、力学性能和加工成型工艺的差异,导致点焊接头的电、热、力分布情况复杂,工艺范围较窄,焊接过程较难控制。高强度钢对热过程和成分变化极为敏感,点焊时极快的冷却速度会完全破坏母材原有的平衡状态,焊后接头易出现性能的降低。本文针对轿车前纵梁结构特点,开展了DP780/HC660不等厚异质高强钢电阻点焊接头微观组织和力学性能的研究。试验分析了焊接工艺参数(焊接电流、焊接时间、电极压力)对点焊接头微观组织、拉伸性能和接头拉伸断裂模式的影响规律,并对比分析焊后回火脉冲处理对点焊接头组织和性能的影响。结果表明,DP780/HC660点焊接头熔核区DP780侧和HC660侧的组织均由较粗大的马氏体和铁素体组成。点焊接头热影响区DP780侧和HC660侧均由细小的马氏体和铁素体组成,临界区的组织比母材组织更细小。随着与熔核中心距离的接近,热影响区两侧晶粒变大,组织中马氏体含量逐渐增加。DP780/HC660焊接接头显微硬度分布规律为熔核区最高,其次为热影响区,母材区最低。D...
【文章来源】:吉林大学吉林省 211工程院校 985工程院校 教育部直属院校
【文章页数】:84 页
【学位级别】:硕士
【部分图文】:
母材的微观组织光镜照片:(a)DP780;(b)HC660
吉林大学硕士学位论文图 2.1 母材的微观组织光镜照片:(a)DP780;(b)HC660Fig.2.1 Microstructure optical image of based metals: (a) DP780; (b) HC660
图 2.1 母材的微观组织光镜照片:(a)DP780;(b)HC660Fig.2.1 Microstructure optical image of based metals: (a) DP780; (b) HC660图 2.2 母材的微观组织电镜照片:(a)DP780;(b)HC660Fig.2.2 Microstructure SEM image of based metals: (a) DP780; (b) HC660
【参考文献】:
期刊论文
[1]Fracture Morphologies of Advanced High Strength Steel During Deformation[J]. Ying Sun,Xifeng Li,Xiangyu Yu,Delong Ge,Jun Chen,Jieshi Chen. Acta Metallurgica Sinica(English Letters). 2014(01)
[2]超高强钢点焊结构拉剪试验及数值仿真[J]. 宇慧平,王伟伟,李晓阳,刘跃华. 焊接学报. 2013(10)
[3]正交试验设计和分析方法研究[J]. 刘瑞江,张业旺,闻崇炜,汤建. 实验技术与管理. 2010(09)
[4]超高强马氏体钢中频、电伺服点焊技术[J]. 陈树君,于洋,王超,卢振洋. 电焊机. 2010(05)
[5]Application of Hot Forming High Strength Steel Parts on Car Body in Side Impact[J]. SUN Hongtu1,2,HU Ping1,2,,MA Ning1,2,SHEN Guozhe1,2,LIU Bo3,and ZHOU Dinglu3 1 State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,China 2 School of Automotive Engineering,Dalian University of Technology,Dalian 116024,China 3 Academy of Changan Automotive Engineering,Chongqing 401120,China. Chinese Journal of Mechanical Engineering. 2010(02)
[6]Tensile and Spring-Back Behavior of DP600 Advanced High Strength Steel at Warm Temperatures[J]. F Ozturk,S Toros,S Kilic. Journal of Iron and Steel Research(International). 2009(06)
[7]Ultra-high cycle fatigue behavior of high strength steel with carbide-free bainite/martensite complex microstructure[J]. Xue-xia Xu, Yang Yu, Wen-long Cui, Bing-zhe Bai, and Jia-lin Gu Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. International Journal of Minerals Metallurgy and Materials. 2009(03)
[8]不等厚板对接焊疲劳寿命结构形状影响分析[J]. 李其朋,陈国华,王磊. 石油化工设备. 2009(03)
[9]TRIP 590高强钢板的点焊工艺性能研究[J]. 高建红,王敏,伍青青,潘华,雷鸣. 电焊机. 2008(11)
[10]Magnetohydrodynamic behaviors in a resistance spot weld nugget under different welding currents[J]. S. Jack HU. Science in China(Series E:Technological Sciences). 2008(09)
博士论文
[1]双相钢点焊熔核界面撕裂失效机理与控制方法研究[D]. 张小云.上海交通大学 2008
本文编号:3123822
【文章来源】:吉林大学吉林省 211工程院校 985工程院校 教育部直属院校
【文章页数】:84 页
【学位级别】:硕士
【部分图文】:
母材的微观组织光镜照片:(a)DP780;(b)HC660
吉林大学硕士学位论文图 2.1 母材的微观组织光镜照片:(a)DP780;(b)HC660Fig.2.1 Microstructure optical image of based metals: (a) DP780; (b) HC660
图 2.1 母材的微观组织光镜照片:(a)DP780;(b)HC660Fig.2.1 Microstructure optical image of based metals: (a) DP780; (b) HC660图 2.2 母材的微观组织电镜照片:(a)DP780;(b)HC660Fig.2.2 Microstructure SEM image of based metals: (a) DP780; (b) HC660
【参考文献】:
期刊论文
[1]Fracture Morphologies of Advanced High Strength Steel During Deformation[J]. Ying Sun,Xifeng Li,Xiangyu Yu,Delong Ge,Jun Chen,Jieshi Chen. Acta Metallurgica Sinica(English Letters). 2014(01)
[2]超高强钢点焊结构拉剪试验及数值仿真[J]. 宇慧平,王伟伟,李晓阳,刘跃华. 焊接学报. 2013(10)
[3]正交试验设计和分析方法研究[J]. 刘瑞江,张业旺,闻崇炜,汤建. 实验技术与管理. 2010(09)
[4]超高强马氏体钢中频、电伺服点焊技术[J]. 陈树君,于洋,王超,卢振洋. 电焊机. 2010(05)
[5]Application of Hot Forming High Strength Steel Parts on Car Body in Side Impact[J]. SUN Hongtu1,2,HU Ping1,2,,MA Ning1,2,SHEN Guozhe1,2,LIU Bo3,and ZHOU Dinglu3 1 State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,China 2 School of Automotive Engineering,Dalian University of Technology,Dalian 116024,China 3 Academy of Changan Automotive Engineering,Chongqing 401120,China. Chinese Journal of Mechanical Engineering. 2010(02)
[6]Tensile and Spring-Back Behavior of DP600 Advanced High Strength Steel at Warm Temperatures[J]. F Ozturk,S Toros,S Kilic. Journal of Iron and Steel Research(International). 2009(06)
[7]Ultra-high cycle fatigue behavior of high strength steel with carbide-free bainite/martensite complex microstructure[J]. Xue-xia Xu, Yang Yu, Wen-long Cui, Bing-zhe Bai, and Jia-lin Gu Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. International Journal of Minerals Metallurgy and Materials. 2009(03)
[8]不等厚板对接焊疲劳寿命结构形状影响分析[J]. 李其朋,陈国华,王磊. 石油化工设备. 2009(03)
[9]TRIP 590高强钢板的点焊工艺性能研究[J]. 高建红,王敏,伍青青,潘华,雷鸣. 电焊机. 2008(11)
[10]Magnetohydrodynamic behaviors in a resistance spot weld nugget under different welding currents[J]. S. Jack HU. Science in China(Series E:Technological Sciences). 2008(09)
博士论文
[1]双相钢点焊熔核界面撕裂失效机理与控制方法研究[D]. 张小云.上海交通大学 2008
本文编号:3123822
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